# 运算符优先级与结合性
print("4 + 4 << 2 =", 4 + 4 << 2)
print("(4 + 4) << 2 =", (4 + 4) << 2)
print("4 + (4 << 2) =", 4 + (4 << 2))
print("100 / 25 * 16 =", 100 / 25 * 16)
